hps metal halide?


New member
i was looking at metal halide high pressure sodium lighting. is this any different than rregular metal halide, and could i use it, or would it be difficult to find replacement bulbs?

HPS is the wrong spectrum for a reef tank. Its more of a red color and does little for corals except probably grow algae. They're commonly used in street lights giving them a red organge hue while MH street lights have the bluish white tinge. You can pick'em out while driving if you look.